Two-Dimensional MXene/Sn Nanocomposite as a Novel Anode In Lithium Ion Batteries With Ultra-High Energy Density
Mentor 1
Dr. Junjie Niu
Location
Union Wisconsin Room
Start Date
28-4-2017 1:30 PM
End Date
28-4-2017 4:00 PM
Description
A new generation of two-dimensional (2D) transition metal carbide materials called MXene, is attracting wide attention in energy storage particularly with lithium ion batteries (LIBs) due to its remarkable electrical conductivity and low Li+ ion diffusion barrier. Herein, we present a novel lithium-based battery system that shows a greatly improved energy density. The anode electrode is comprised of MXene/Sn hybrid nano-composites, which were synthesized using a facile hydrothermal-assisted approach. The signicantly enhanced conductivity of 2D MXene along with the uniformly dispersed Sn nanoparticles leads to a drastically increased electrochemical property. The assembled battery system exhibits a high specific capacity of 700 mAh/g after 100 cycles at 0.5 C and a capacity of ~450 mAh/g after ultra-long 1000 cycles at 2 C, respectively. These results demonstrate the MXene/Sn composite has a promising potential in next-generation LIBs. Further, the pouch-type full cell using the composite as anode and Li(Ni0.6Mn0.2Co0.2O2 (NMC-622) as cathode displays a reliable and repeatable battery performance, which opens an avenue for large-scale stacking batteries in broad applications such as potable electronic devices.
Two-Dimensional MXene/Sn Nanocomposite as a Novel Anode In Lithium Ion Batteries With Ultra-High Energy Density
Union Wisconsin Room
A new generation of two-dimensional (2D) transition metal carbide materials called MXene, is attracting wide attention in energy storage particularly with lithium ion batteries (LIBs) due to its remarkable electrical conductivity and low Li+ ion diffusion barrier. Herein, we present a novel lithium-based battery system that shows a greatly improved energy density. The anode electrode is comprised of MXene/Sn hybrid nano-composites, which were synthesized using a facile hydrothermal-assisted approach. The signicantly enhanced conductivity of 2D MXene along with the uniformly dispersed Sn nanoparticles leads to a drastically increased electrochemical property. The assembled battery system exhibits a high specific capacity of 700 mAh/g after 100 cycles at 0.5 C and a capacity of ~450 mAh/g after ultra-long 1000 cycles at 2 C, respectively. These results demonstrate the MXene/Sn composite has a promising potential in next-generation LIBs. Further, the pouch-type full cell using the composite as anode and Li(Ni0.6Mn0.2Co0.2O2 (NMC-622) as cathode displays a reliable and repeatable battery performance, which opens an avenue for large-scale stacking batteries in broad applications such as potable electronic devices.
